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A. T. WALDRON. VALVE No. 447,590. Patented Mar. 3,1891

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A. T. WALDRON. VALVE.

.No. 447,590. Patented Mar. 3, 1891.

NirE TATES Fri-CE."

ATENT ASA T. \VALDRON, OF \VATERFORD, NEW YORK, ASSIGNOR TO THE MOH AYVKAND HUDSON MANUFACTURING COMPANY, OF SAME PLACE.

VALVE.

SPECIFICATION forming part of Letters Patent No. 447,590, dated March 3,1891.

Application filed July 5, 1890. Serial No. 357,775. (No model.)

To all whom it may concern.-

l 3e it known that I, ASA T. \VALDRON, a citizen of the United States,residing at Vaterford, county of Saratoga, and State of New 5 York, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a specification.

My invention relates to such improvements; and it consists of the novelconstruction and 1c combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings and the letters ofreference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.

My invention relates particularly to improvements in that class ofvalves shown in United States Patent No. 140,407,issued July 1, 1873, toG. W. Eddy, wherein two disks or gates located on opposite sides of aninelosing chamber are moved by a gate-carrier transversely across thewater-channel to their respective seats surrounding theoppositelylocated channelopenings in the chamberwalls. Theoppositely-located gate-seats occupy converging planes,'and the gatesbeing rnovable angularly to their carrier, which is 0 lnterposed betweenthem, are forced to their inclined seats by the transverse movementacross the channel. Long experience in the manufacture and use of suchgates has enabled me to observe that the bearings between 5 the gatesand their carrier, as well as that portion of the gates which engageswith their seats, are first to wear away. As soon as the wear issufficient to allow the gates to be moved pastthe channel-openings or tothe end of the chamber the openings cannot be tightly closed and thevalve becomes worthless. I have ascertained that the carrier can beeasily and cheaply provided with two or more sets of bearing-surfacesadapted to e11- gage with and support the gates, whereby the life of thevalve can be prolonged without substituting any new parts or repairingany old ones.

Figure 1 of the drawings is a central vertical section of my improvedvalve, showing the gate-carrier and carrier-stem in full. Fig.

2 is a horizontal section of the same, taken on the broken line 2 2 inFig. 1. Fig. 3 is an end view of the carrier detached with the small enduppermost. Figs. 4 and 5 are respectively side and end views of adetached carrier, showing a modified form of construction.

A is the valve-case, which is provided with a chamber A, adapted toreceive the gates B and gate-carrier O. The water-channel passes acrossthe lower end of the chamber and through the openings A in thevalve-case. The gate-seats B are formed on the inner side of the case orchamber walls around the openings and occupy inclined planes, whichconverge at the lower part of the valve as shown in Fig. 1.

The carrier is provided with a central aperture O, threaded to receivethe threaded end of the carrier-stem C the other end of which stempasses up through the stuffing-gland A in the usualmanner and isprovided with the usual operating hand-wheel A and supporting-collar AThe gates are shown in en- 7 gagement with their seats to close thechannel-openings. By turning the carrier-stem backward the carrier isdrawn upward upon the threaded portion, and the carrier trunnions orbosses C resting in sockets B in the backs of the gates, lift the gatesfrom their seats up into the chamber to the position indicated by thedotted lines in Fig. 1. By turning the stem forward in the oppositedirection the gates are forced downward by the trunnions until they aresecurely seated by the spherical part 0 of the carrier, which engageswith the concaved surfaces 13 on the gate-backs to seat the gates uponthe inclined seats. 0

I have shown the body of the carrier provided with trunnions and partlyspherical in form and the gate-backs socketed and concaved to receiveand fit the trunnions and spherical form of the carrier, thereby provid-5 ing for the angular adjustment of the gates relatively to the carrier,as well as for their vertical movements, whereby the gates are free tomove upon their supporting-bearings to conform in position to theinclination of their seats.

Any known form of bearing-supports may be employed which will supportthe gates and permit of their vertical and angular movements. I preferto make the bearing parts on one end of the carrier a little larger thanthose on the other end to compensate for the wear of thecarrier-bearings located upon the gates when the carrier is reversed. Ihave shown such parts larger on the upper end of the carrier than thoseon the lower end in Fig. 1, while in Fig. 3 the relative positions ofthe two sets of bearings are reversed.

In Figs. a and 5 I have shown the two sets of bearings arranged in thesame horizontal plane upon the carrier. hen thus arranged the body ofthe carrier may be so formed that a central horizontal section would beslightly elliptical in form, as will appear from inspection of Fig. 5,the major axis (represented by the dotted line a a) passing through thelarger set of bearings, and the minor axis b I) through the smallersetof bearings. To alter the position of the carrier, so as to change fromone set of hearings to another, the carrier shown in Fig. 1 is reversedend for end on the stem and that shown in Figs. l and 5 given aquarter-turn upon the stem.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. In a valve, the combination, with a pair of oppositelylocated gates,each provided with a carrier-bearing on its back, and converginggate-seats, ot' a carrier-stem, with means for operating the stem, and agate-carrier provided with two sets of gate supportin g and seatingbearings, substantially as and for the purposes set forth.

2. In a valve, the combination, with a pair of oppositely-located gates,each provided with a carrier-bearing on its back, and con verginggate-seats, of a carrier-stem, with means for operating the stem, and agate-carrier provided with two sets of gate supporting and seatingbearings differing from each other in size, for the purpose of providinga compensation for the wear of the carrierbearings upon the backs of thegates, substantially as described.

In testimony whereof I have hereunto set my hand this 3d day of July,1890.

ASA T. WALDRON. Witnesses:

CHARLES H. COLE, EDGAR G. MOKALLOR.

